Said I was being sued by IRS and left message telling me I must call back immediately.  Of course we know this is a scam.

I think this. Was a scam call .  They said some thing about money.  The call was so noisy I could not really hear what was said.  When I complained about the noise they hung up.

I got a call from this number and they left a message saying the irs was filing a lawsuit against me. I'm very happy to hear it's a scam. Kinds freaked me out at first.